BIOL 1001May 7

BIOL 1001May 7 - • Chlorella sp a green algae...

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BIOL 1001 May 7, 2010 Endosymbiont hypothesis: Certain organelles, especially chloroplasts and mitochondria, arose as mutually beneficial associations between the ancestors of eukaryotic cells and captured bacteria that lived within the cytoplasm of the pre-eukaryotic cells How eukaryotes evolve form prokaryotic Probable Origin of Mitochondria and Chloroplasts (Fig. 17-4) Evidence that supports the endosymiont hypothesis: 1. Distinctive biochemical features shared by eukaryotic organelles and living bacteria 2. Mitochondria and chloroplast each contain their own geonomes 3. Modern intracellular symbiosis Modern Intracellular Symbiosis (fig. 17-5)
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Unformatted text preview: • Chlorella sp., a green algae Multicellular Organisms 1. Advantages of multicellularity 2. The first multicellualr organisms- 1 BYA 3. Plants- primitive marine algae 4. Animals- marine invertebrates 5. The Cambrian “Explosion”- 544 MYA 6. Almost all modern forms of animals arose at this time Evolution of Life on Earth Earth’s History Projected on a 24- hour Day Human Evolution • Primate Evolution Hominid Evolution Evolution of Homer Video REVIEWWW: Office hrs: 642 LSB MTW 9-11:45 On exam: Chapters 12 13 14 17 Chemiosmosis Gametes Homeostasis Mutations...
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